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Human milk oligosaccharides

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https://www.readbyqxmd.com/read/28726512/human-milk-oligosaccharide-categories-define-the-microbiota-composition-in-human-colostrum
#1
J Aakko, H Kumar, S Rautava, A Wise, C Autran, L Bode, E Isolauri, S Salminen
Human milk oligosaccharides (HMOs) are structurally diverse unconjugated glycans with a composition unique to each lactating mother. While HMOs have been shown to have an impact on the development of infant gut microbiota, it is not well known if HMOs also already affect milk microbial composition. To address this question, we analysed eleven colostrum samples for HMO content by high-pressure liquid chromatography and microbiota composition by quantitative PCR. Higher total HMO concentration was associated with higher counts of Bifidobacterium spp...
July 20, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28724660/human-milk-oligosaccharides-potent-weapons-in-the-battle-against-rotavirus-infection
#2
Sharon M Donovan
No abstract text is available yet for this article.
July 19, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28713365/what-s-normal-immune-profiling-of-human-milk-from-healthy-women-living-in-different-geographical-and-socioeconomic-settings
#3
Lorena Ruiz, Irene Espinosa-Martos, Cristina García-Carral, Susana Manzano, Michelle K McGuire, Courtney L Meehan, Mark A McGuire, Janet E Williams, James Foster, Daniel W Sellen, Elizabeth W Kamau-Mbuthia, Egidioh W Kamundia, Samwel Mbugua, Sophie E Moore, Linda J Kvist, Gloria E Otoo, Kimberly A Lackey, Katherine Flores, Rossina G Pareja, Lars Bode, Juan M Rodríguez
Human milk provides a very wide range of nutrients and bioactive components, including immune factors, human milk oligosaccharides, and a commensal microbiota. These factors are essential for interconnected processes including immunity programming and the development of a normal infant gastrointestinal microbiome. Newborn immune protection mostly relies on maternal immune factors provided through milk. However, studies dealing with an in-depth profiling of the different immune compounds present in human milk and with the assessment of their natural variation in healthy women from different populations are scarce...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28698533/prevention-and-management-of-cow-s-milk-allergy-in-non-exclusively-breastfed-infants
#4
REVIEW
Yvan Vandenplas
Introduction: The prevention and management of cow milk allergy (CMA) is still debated. Since CMA is much less frequent in breastfed infants, breastfeeding should be stimulated. Method: Literature was searched using databases to find original papers and reviews on this topic. Results: Hydrolysates with a clinical proof of efficacy are recommended in the prevention and treatment of CMA. However, not all meta-analyses conclude that hydrolysates do prevent CMA or other atopic manifestations such as atopic dermatitis...
July 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28643627/bifidobacteria-and-their-health-promoting-effects
#5
Claudio Hidalgo-Cantabrana, Susana Delgado, Lorena Ruiz, Patricia Ruas-Madiedo, Borja Sánchez, Abelardo Margolles
Bifidobacteria are members of the intestinal microbiota of mammals and other animals, and some strains are able to exert health-promoting effects. The genus Bifidobacterium belongs to the Actinobacteria phylum. Firmicutes, Bacteroidetes, and Actinobacteria constitute the most abundant phyla in the human intestinal microbiota, Firmicutes and Bacteroidetes being predominant in adults, and Actinobacteria in breast-fed infants, where bifidobacteria can reach levels higher than 90% of the total bacterial population...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28637685/milk-oligosaccharides-inhibit-human-rotavirus-infectivity-in-ma104-cells
#6
Daniel R Laucirica, Vassilis Triantis, Ruud Schoemaker, Mary K Estes, Sasirekha Ramani
Background: Oligosaccharides in milk act as soluble decoy receptors and prevent pathogen adhesion to the infant gut. Milk oligosaccharides reduce infectivity of a porcine rotavirus strain; however, the effects on human rotaviruses are less well understood.Objective: In this study, we determined the effect of specific and abundant milk oligosaccharides on the infectivity of 2 globally dominant human rotavirus strains.Methods: Four milk oligosaccharides-2'-fucosyllactose (2'FL), 3'-sialyllactose (3'SL), 6'-sialyllactose (6'SL), and galacto-oligosaccharides-were tested for their effects on the infectivity of human rotaviruses G1P[8] and G2P[4] through fluorescent focus assays on African green monkey kidney epithelial cells (MA104 cells)...
June 21, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28630345/synthesis-of-asymmetrical-multiantennary-human-milk-oligosaccharides
#7
Anthony R Prudden, Lin Liu, Chantelle J Capicciotti, Margreet A Wolfert, Shuo Wang, Zhongwei Gao, Lu Meng, Kelley W Moremen, Geert-Jan Boons
Despite mammalian glycans typically having highly complex asymmetrical multiantennary architectures, chemical and chemoenzymatic synthesis has almost exclusively focused on the preparation of simpler symmetrical structures. This deficiency hampers investigations into the biology of glycan-binding proteins, which in turn complicates the biomedical use of this class of biomolecules. Herein, we describe an enzymatic strategy, using a limited number of human glycosyltransferases, to access a collection of 60 asymmetric, multiantennary human milk oligosaccharides (HMOs), which were used to develop a glycan microarray...
July 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28620481/tolerability-and-safety-of-the-intake-of-bovine-milk-oligosaccharides-extracted-from-cheese-whey-in-healthy-human-adults
#8
Jennifer T Smilowitz, Danielle G Lemay, Karen M Kalanetra, Elizabeth L Chin, Angela M Zivkovic, Melissa A Breck, J Bruce German, David A Mills, Carolyn Slupsky, Daniela Barile
Mechanistic research suggests a unique evolutionary relationship between complex milk oligosaccharides and cognate bifidobacteria enriched in breast-fed infants. Bovine milk oligosaccharides (BMO) were recently identified as structurally and functionally similar to human milk oligosaccharides. The present single-blind three-way crossover study is the first to determine the safety and tolerability of BMO consumption by healthy human participants (n 12) and its effects on faecal microbiota and microbial metabolism...
2017: Journal of Nutritional Science
https://www.readbyqxmd.com/read/28614672/composition-and-variation-of-macronutrients-immune-proteins-and-human-milk-oligosaccharides-in-human-milk-from-nonprofit-and-commercial-milk-banks
#9
Laura Meredith-Dennis, Gege Xu, Elisha Goonatilleke, Carlito B Lebrilla, Mark A Underwood, Jennifer T Smilowitz
BACKGROUND: When human milk is unavailable, banked milk is recommended for feeding premature infants. Milk banks use processes to eliminate pathogens; however, variability among methods exists. Research aim: The aim of this study was to compare the macronutrient (protein, carbohydrate, fat, energy), immune-protective protein, and human milk oligosaccharide (HMO) content of human milk from three independent milk banks that use pasteurization (Holder vs. vat techniques) or retort sterilization...
June 1, 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28611768/innate-immunity-and-breast-milk
#10
REVIEW
Nicole Theresa Cacho, Robert M Lawrence
Human milk is a dynamic source of nutrients and bioactive factors; unique in providing for the human infant's optimal growth and development. The growing infant's immune system has a number of developmental immune deficiencies placing the infant at increased risk of infection. This review focuses on how human milk directly contributes to the infant's innate immunity. Remarkable new findings clarify the multifunctional nature of human milk bioactive components. New research techniques have expanded our understanding of the potential for human milk's effect on the infant that will never be possible with milk formulas...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28609134/relationships-among-microbial-communities-maternal-cells-oligosaccharides-and-macronutrients-in-human-milk
#11
Janet E Williams, William J Price, Bahman Shafii, Katherine M Yahvah, Lars Bode, Mark A McGuire, Michelle K McGuire
BACKGROUND: Human milk provides all essential nutrients necessary for early life and is rich in nonnutrients, maternally derived (host) cells, and bacteria, but almost nothing is known about the interplay among these components. Research aim: The primary objective of this research was to characterize relationships among macronutrients, maternal cells, and bacteria in milk. METHODS: Milk samples were collected from 16 women and analyzed for protein, lipid, fatty acid, lactose, and human milk oligosaccharide concentrations...
August 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28593759/enzymatic-synthesis-and-purification-of-galactosylated-chitosan-oligosaccharides-reducing-adhesion-of-enterotoxigenic-escherichia-coli-k88
#12
Ya Lu Yan, Ying Hu, David J Simpson, Michael G Gänzle
Enterotoxigenic Escherichia coli (ETEC) K88 causes diarrhea in weaned piglets and represent a suitable model system for ETEC causing childhood diarrhea. This study aimed to evaluate the effects of oligosaccharides against ETEC K88 adhesion to porcine erythrocytes with two bioassays. Galactosylated chitosan-oligosaccharides (Gal-COS) were synthesized through transgalactosylation by β-galactosidase. Fractions 2-5 of Gal-COS were obtained through cation exchange and size exclusion chromatography. Fractions 2-5 of acetylated Gal-COS were obtained through chemical acetylation followed by size exclusion chromatography...
June 28, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28570820/human-milk-oligosaccharides-exhibit-antimicrobial-and-anti-biofilm-properties-against-group-b-streptococcus
#13
Dorothy L Ackerman, Ryan S Doster, Jörn-Hendrik Weitkamp, David Aronoff, Jennifer A Gaddy, Steven D Townsend
Streptococcus agalactiae (Group B Streptococcus, GBS) is a Gram-positive bacterial pathogen that causes invasive infections of both children and adults. During pregnancy, GBS is a significant cause of infection of the fetal membranes (chorioamnionitis), which can lead to intra-amniotic infection, preterm birth, stillbirth, and neonatal sepsis. Recently, breastfeeding has been thought to represent a potential mode of GBS transmission from mother to newborn, which might increase the risk for late-onset sepsis...
June 1, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28558635/recent-technology-development-for-the-biosynthesis-of-human-milk-oligosaccharide
#14
Ningzi Guan, Rachel Chen
Human milk oligosaccharide (HMO) is a third most abundant component in breast milk. HMOs are molecules naturally tailored to the need of an infant. They protect infants from diseases, foster healthy gastrointestinal systems, reinforce fledgling immune function, and promote early brain development. Supplementing HMOs to infant formulae, which lack this critical element, would substantially improve the function of formulae. Overwhelming evidences also indicate that HMOs can be used for the treatment of arthritis and related autoimmune disease, and inhibition of bacteria adhesion or as potential prebiotics...
May 30, 2017: Recent Patents on Biotechnology
https://www.readbyqxmd.com/read/28554622/comparison-of-anti-pathogenic-activities-of-the-human-and-bovine-milk-n-glycome-fucosylation-is-a-key-factor
#15
Wen-Li Wang, Wei Wang, Ya-Min Du, Hong Wu, Xiao-Bo Yu, Ke-Ping Ye, Chun-Bao Li, Yong-Sam Jung, Ying-Juan Qian, Josef Voglmeir, Li Liu
Health differences between breast- and formula-fed infants have long been apparent despite great efforts in improving the function of baby formula by adjusting the levels of various milk nutritional components. However, the N-glycome, a type of oligosaccharide decorating a diverse range of proteins, has not been extensively studied in milk regarding its biological function. In this study, the anti-pathogenic function of the enzymatically released human and bovine milk N-glycome against 5 food-borne pathogens was investigated...
November 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28545589/gastrointestinal-tolerance-of-low-fodmap-oral-nutrition-supplements-in-healthy-human-subjects-a-randomized-controlled-trial
#16
Jennifer Erickson, Renee Korczak, Qi Wang, Joanne Slavin
BACKGROUND: There has been increasing interest in utilizing a diet low in fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAPs) for the treatment of irritable bowel syndrome (IBS), a functional gastrointestinal disease. While studies have indicated that this diet can be effective at symptom reduction, it is a restrictive diet and patients may find it challenging to find low FODMAP products to meet their nutrient needs. The primary objective of this study was to assess the gastrointestinal (GI) tolerance of three low FODMAP oral nutrition supplements (ONS) in healthy adults...
May 25, 2017: Nutrition Journal
https://www.readbyqxmd.com/read/28544984/histo-blood-group-antigens-as-mediators-of-infections
#17
REVIEW
Julie E Heggelund, Annabelle Varrot, Anne Imberty, Ute Krengel
The critical first step of a microbial infection is usually the attachment of pathogens to host cell glycans. Targets on host tissues are in particular the histo-blood group antigens (HBGAs), which are present in rich diversity in the mucus layer and on the underlying mucosa. Recent structural and functional studies have revealed significant new insight into the molecular mechanisms, explaining why individuals with certain blood groups are at increased risk of some infections. The most prominent example of blood-group-associated diseases is cholera, caused by infection with Vibrio cholerae...
May 22, 2017: Current Opinion in Structural Biology
https://www.readbyqxmd.com/read/28513631/paediatrics-are-human-milk-oligosaccharides-the-magic-bullet-for-necrotizing-enterocolitis
#18
Michael S Caplan
No abstract text is available yet for this article.
July 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28505592/human-norovirus-inhibition-by-a-human-milk-oligosaccharide
#19
Anna Koromyslova, Shailesh Tripathi, Vasily Morozov, Horst Schroten, Grant S Hansman
Human noroviruses are the leading cause of outbreaks of acute gastroenteritis. Norovirus interactions with histo-blood group antigens (HBGAs) are known to be important for an infection. In this study, we identified the HBGA binding pocket for an emerging GII genotype 17 (GII.17) variant using X-ray crystallography. The GII.17 variant bound the HBGA with an equivalent set of residues as the leading pandemic GII.4 variants. These structural data highlights the conserved nature of HBGA binding site between prevalent GII noroviruses...
May 12, 2017: Virology
https://www.readbyqxmd.com/read/28490677/dietary-human-milk-oligosaccharides-but-not-prebiotic-oligosaccharides-increase-circulating-natural-killer-cell-and-mesenteric-lymph-node-memory-t-cell-populations-in-noninfected-and-rotavirus-infected-neonatal-piglets
#20
COMPARATIVE STUDY
Sarah S Comstock, Min Li, Mei Wang, Marcia H Monaco, Theresa B Kuhlenschmidt, Mark S Kuhlenschmidt, Sharon M Donovan
Background: Human milk oligosaccharides (HMOs) have antimicrobial and immunomodulatory actions. It has previously been reported that these oligosaccharides contribute to the reduced duration of rotavirus-induced diarrhea in pigs.Objective: We measured the effects of HMOs and prebiotic oligosaccharides on immune cell populations from noninfected and rotavirus-infected pigs. We hypothesized that dietary HMOs would modulate systemic and gastrointestinal immunity.Methods: Colostrum-deprived newborn pigs were fed formula, formula with 4 g HMOs/L (2'-fucosyllactose, lacto-N-neotetraose, 6'-sialyllactose, 3'-sialyllactose, and free sialic acid), or formula with 3...
June 2017: Journal of Nutrition
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